钙钛矿(结构)
化学工程
碳纤维
钙钛矿太阳能电池
阴极
阳极
电化学
介电谱
作者
Junshuai Zhou,Siqi Li,Xinding Lv,Xitao Li,Yao Li,Yan-Zhen Zheng,Xia Tao
标识
DOI:10.1016/j.jpowsour.2020.228764
摘要
Despite impressive power conversion efficiency (PCE) climbing up to 25.2%, complex processing and high cost of perovskite solar cells (PSCs) associated with hole transport material (HTM), Au counter electrode and transparent conducting oxide (TCO) electrode limit the commercial applications of PSCs. We herein fabricate an ultra-low-cost HTM-free C-PSC with the structure of AgNWs-graphene (AgNWs-G)/SnO2/perovskite/carbon by using 1D-2D hybrid AgNWs-G transparent electrode instead of conventional ITO electrode. The optimized AgNWs-G film (AgNWs-G-2 film) with a relatively high transmittance (~86%) achieves a sheet resistance (Rs) of 11.0 Ω sq−1 lower than that of ITO (13.5 Ω sq−1). Compared with AgNWs film, the AgNWs-G-2 film exhibits fantastic stability of Rs within the entire duration of air exposure, even though at high temperatures or continuous illumination. Such the low-cost AgNWs-G based C-PSC achieves an outstanding PCE of 15.31% and a long-term stability of 87.5% for 60 days in air conditions. It is worth noting that all preparing processes from bottom electrode to counter electrode in the total PSC device are operated in actual ambient air condition, and the annealing temperature for each functional layer is no more than 150 °C, hence leading to the construction of ultra-low-cost PSCs.
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